Adjustable hone



Jan. 6, 1942 J. J. PALOTQE. l' Y l. 2,269,378

ADJUSTABLE HONE l Y Filed June 6,1941 'ag a'sheets-sheet 1 v CE1- i-.. Y

@ATC j Jano 6 J. J. PALoTcE w 2.259,378 'ADJUSTABLE HOMEv Y v Filed Jun, 1941 n 3 sheets-sheet 2 Z2 Kyla. 6,1* 6

l in,

Jan. 6, 1942 y f J J, LOT-CE. 2,269,378

ADJUSTABLE HONE f yFiled June 1941 3 Sheets-Sheet 5 ,"IIIIIIIHII 0a Jwfm,

UNI-TEDLSTATE purposes.

A' effective diameter of the hone. I

Patented Jan. 6, 1942 "ADJUSTABLE noNE,

JohnJ. Palote'e, Youngstown, Ohio Y' n ApplicationJunev';1911,` VSerial'No.396.916A

j11emma](Clisi-1843)*` This-invention is a novelimprovement'in'ad- Justable abrasive hones; and thel principal object thereof is to -provide a. simple, novel andeilicient elongated cylindrical stone .hone of .relatively small diameter possessing certain novel featuresv of construction hereinafter setforth whereby the: Yhone, when Wet or dry, will be particularly'adapt- I ed forinsertion into, for thepurpose of grind ing, machining, Vfinishing,polishing, or boring,

` bearingsA ofwrelativelysmall diameter, such as.-v

crank-shaft bearings, connecting-rod. bearings,

struction, and novel; combinations o which protection is desired In said drawingsfi ?Figs. 1 and latogether section through one; form- .ofadjustable hone fl parts, for

according to my invention Fig. 2 is aside elevationo f` lone-'lof the hone f holders with hone, detached from assembly.y

wrist pin bearings, main kbearingsror the like, i although the hone may be used for-many other,

One object hone of the above type consisting of a Vspindle when fully contracted around thespindle form-v ing anl unbroken cylindrical grinding surface; and 1- said holders and e spindles having complei of' the*v invention provide a i f Fig.8` is a transverse section o n line 8 4, Fig. 1. Fig. 9 isa planview. ofthehone -assembly showing the arrangement of:

Fig. 3 an enlarged end view O1' the hone holder and hone shown in Fig. -2. .l y

Fig-.iisan elevation of one en d of the adjustable hone. f

.Fig.. 5f isa transverse Ysection en kline 5 5,

1 Fig. 6 is a transverse section on line 8 1,

Fig. 'lis a transverse section on line 1 1,` Fig. 1.

spiral ,grooves formed in theperiphery thereof. `.y Fig.'j.;10 is a longitudinal Vsection showing a l modified means for yieldably holdingthe hone mental tapered surfaces, Vmeans being also pro-` vided for shiftingthe spindle "axially vof the holders to eiec-t an expansion orcontraction f- .tQ vary the f.

the hones with'respect to the spindle Further objects of the invention vare to provide I a hone of the above type having novel means for' adjusting the spindle' axially of the holders; also having novel means' for'yieldably maintaining the y tapered surfaces of the holders and` spindle in' i closecontact while* permitting shifting of .the

spindle; also havingnovelmeanslfor yieldably preventing the holders l'from-bulging outwardly when the spindle 1S shifted t expand tnenomers With respect thereto. v A

-Still further objects' of the-invention are -`tol the abovetype in which thespindle yis v-provided with centering means' at eachnend whereby thev adjusted; also to' provide an adJustablehonel of samedirectionr Adjacent theoppositeend of the vspindle'is afsimilar' hexagonal -tapered enlargement I-c havingthe same slopeorytaper as hone assembly may be accuratelyv ground into' truly cynndriesi shape; 'susa to provide a-'noneqf F1 the accompanying,.drawings which illustrate several practical embodiments thereoftol enable Y v [othersto adoptand use the sameiand will sumthe above type in which' thel hone as sembiyis provided'wlth'spiral overallfiiameteray Figs. 14 and15 are detail views.

holders on the spindle while permitting the or contract relative to the spindle..

rig. 12 is an end elevation" oftne modification Fig. 13 is a side elevationshowing angindicating scale.. for use in adjustingthe hone izo-various preferably comprises, a relatively `long pilot .spindle 'l' of somewhat greater;length than thaty of the de aired hone abrasive surface, saidspindle I lhaving-a hexagonaltapered enlargement la (Figs. '1 and 6) at one-end,-said taperilaringoutwardly Atowardsthe-end ofthe spindle.l Intermediate the ends ofthe spindle are onefor more similar hexagonal tapered -enlargementslb having the same slope ortaper as enlargement la and in the the enlargements `la, 'lb and direction.

. Beyond thegenlargement YIciis-areduced spindle lextensionld threaded as st lt to-freceive a tapped -collar Ihaving an axially disposed conicalrecess 2a on rits inner: face for the purpose hereinafter described.. Preferably the `peripheryof collar 2 'is knurled soethat the'same may readilybe turned marize in the Claims thenovel features 01' c011- 55 by hand' to advange 0r. r etrgtthe collar 9u ovvi av longitudinal a section-.online Il-I I, y

likewise inthe samev spindle I. Preferably the outer face of collar 2 is provided with a hexagonal or other non-circular extension 2b for engagement by a wrench whereby the collar may be rotated with respect to spindle I. In the spindle extension Id is an axially disposed tapped bore Ie adapted to receive the threaded shank 3b of a non-circular centering plug 8 having an axially disposed conical recess 3a in its outer end for the purpose hereinafter described. The non-circular body of plug 3 may be engaged by a wrench whereby the spindle may be held from rotation while the collar 2 is being rotated.

In the opposite end of spindle I is `an axial bore If (Figs. 1 and 6) of substantial diameter and length adapted to slidably receive a tubular member I housing a bolt having a head 5a. slidable within the outer end of tube I, the shank of bolt 5 passing through a perforated collar 5b nxedly mounted as by threaded engagement or the like within the inner end of tube. 4, the

threaded end of the shank of said bolt engaging a tapped bore Ig in spindle I coaxial with bore If. Within tube 4 disposed between the head 5a of the bolt andthe collar 5b is a coiled spring 6 under compression and normally urging the tube I inwardly of the spindle bore I f. Fixedly mounted on the outer end of tube 4 is a collar 'I preferably threaded and locked thereon in any desired manner; and in the inner face of collar 'I is a conical recess 1a similar to the conical recess 2a of collar 2, for the purpose hereinafter described. In the outer end of head 5a of bolt 5 Cil tapered surfaces Ia. Ib and Ic whereby each of the1 holders 8 may move radially inwardly or outwardly of spindle I but are prevented from lateral movement thereon. By way of illustration in Fig. 6 the three holders 8 disposed below the horizontal axis of bolt 5 are shown moved radially outwardly of the shaft, whereas the three holders above the horizontal axis of .bolt

.-5 are shown in their fully retracted positions, it

being understood however that all of the sections would be simultaneously retracted or projected equal amounts at the same time as hereinafter explained.

The outer ends of the guides' 8e at each end of the holders project beyond the ends `of the holders and their upper faces are tatween the bolt head 5a and the collar 5b, and

. ingly tapered ends 8f of the outermost guides is a diametrical slot5c for engagement with a l screw driverl or other tool whereby the'bolt may be threaded into bore Ig of the spindle; and disposed axially oi said bolt head 5a is a lconical recess 5d, for the purpose hereinafter described.

The six faces ofthe tapered enlargements Ia,

Ib, Ic of the spindle are adapted to slidably support six metallic blade holders 8, shown more particularly in Figs. 2, 3, 6, 7 and 8, said holders being substantially channel-shaped and extending the length of spindle I embracing said extensions Ia and Ic; and said holders are mounted around the spindle and are of such Widththat the sides thereof will abut when the holders 8 are fully retracted as shown in Figs. 7 and 8. Each holder 8 is provided with outwardly extending flanges 8a which also abut when the hone holders 8 are in fully retracted position. Each of the holders 8 carries a Carborundum or other hone 9 which is preferably cast into the holder, said hone 9 extending outwardly beyond the flanges 8a and having an arcuate outer periphery whereby the peripheries of all the six hones 9 when their holders 8 are in retracted position will together form a cylindrical hone in which the sides of the hones 9 in adjacent holders contact squarely as indicated in Figs. 7 and 8.

Y their corresponding surfaces Ia, Ib and Ic. On.'l

the undersides of the holders 8 coextensive with 8e of the holders in` all retracted or projected positions of the holders 8 to thereby yieldably maintain the tapered surfaces 8b and 8d of the holders 8 in close contact with their corresponding tapered* surfaces Ia and Ic of spindle I for any axially adjusted position of spindle I with respect to the holders 8. Y

In order to prevent outward bulging of the "relatively long holders 8V during operation or during axial adjustment of thespindle, interengaging Vflat springs are provided on the undersides of the holders and on the spindle I, as illustrated in Figs. l, 1d and '7. As shown, fiat springs- 8g are secured to the undersidesA of the holder 8 intermediaterthe tapered portions 8b, 8c and the tapered portions 8c, 8d, said springs being adapted to underlie cooperating flat springs guides 8e respectively engaging the slots Ih the tapered enlargements Ia, Ib and Ic. In so placing the-holders the flat springs 8g of the respective holders would be positioned beneath the flat springs -Ik of the spindle I to initially hold the holders in place on the spindle while the collar 2 is; moved on the spindle sufficiently to engage theltapered ends 8f of the outermost guide 8e in the conical recesses 2a and la of the collars 2 and l, the tightening of the collar 2 on spindle I being effected either manually or by using a pair of wrenches engaging the hexagonal portion v2b of collar 2 and the centering plug 3 respectively. Further tightening of the collar 2r will shift the spindle I axially with re- Y spect to the assembled holders 8 (towards the each of the tapered surfaces 8b, 8c and 8d are axially disposed guides 8e engaging corresponding longitudinal slots Ih in eachjof the right in Fig. la) and the sliding movement of the tapered portions Ia, Ib and Ic of spindle I on their related tapered portions 8b, 8c and 8d of the respective holders 8 will cause the holders to move radially outwardly while the guides f aeeasve 8e are vretained in their respective guide `slots Ih.l i. infthe tapered portions of the spindlefl, said holders yseparating slightly, duringr the` expanding movement, as indicated by. the x three ,holders disposed below the horizontal axis of .boltr5 in-Fig. 6.1

Since collar'l is yieldably connected with the spindle I. the collars 2 and 1 will merely` separate slightly during expansion of the yhone according i f tothe axialmovementlof the spindle with re-M e spect to the lholder assembly, and ^.the- -.rt'apered engagement ,of Irecesses 2a and lawith the correspondingl tapered ends 8f of theoutermost cated.` in Fig-,13.y The pointer mayl conveniently Acomprisea [strip-,of metal $11. weldedtda flange vSalif its related hone holder `8l and havingits indicator portion-Qaextending beyond y.the adjacent end4 of the. honeso as to `overlie the scale rangement whenV the collar 2y isfrotated relative to the spindle, the reading ofthe A marker 9x on the sc ale y2:r.of the collarfwill directly indicate. 10.

the overall diameter of the expanded hone without necessitating;theffuserofiealipers Yor other extraneous measuring instruments.l Y.

guides 8e-of. therholders will permit the holdersto move radiallyoutwardly .while at the same. timethesprings 6 will causerthe collarsto;yield.

ably maintain the taperedA portionsfb, .8d. of they l holdersgin contact with their-"corresponding ta-V peredportionsvon their tapered seats Ia and lc, thus forming a relatively'rigid assemblyfor any vaxial adjustment ofthe spindle. During thej exv.panson and contraction of the holdersthe in- Qf terengaging flat' springs sqand' llc of the holders and spindles Vmerelyvyield Yto suchy movement.

Whenthe partsare thus assembledlthe honeV maybe placed in apower grinding machine cen-' tered by the conical recesses :la` and 5 d in the. e outer ends of thebolt head-5a. andce'nteringq y plug-3 respectively and thev peripheries of. all

ofthe hones llvmay'beground-accuratelyto form a true cylindrical surface concentric with `the axis of the hone or spindle.

the hone and throw sameoif-center. f'

As shown in Figsfll and 1l,v a modification of the means for Ayieldably holding thefcenters*r of the -holdersagainst bulging maybe" used. Iny this modification they undersides 'of the holders Bare provided with the same fiat springs Bggj shown in Figs. A1v and 1a, but insteadof using the` y 'cooperating iiatsprings Ik on the spindle, the

way of the flat springs 8g of .the'respective hone f holders .8 soas to form a series of pairs of spaced Mmembers, permittingA the outery ends' of the Ifdo not limitmy. invention vto the exact forms shownin thedrawings, for'obviously changes may f be madel therein within the scopefof thejfclaims;

- and vinsteadvof using six holdersjand hones, as

lshown in the drawings, a more. or less Y, number may .be similarly usedfwhere desired.;

v.I claims...`

2() j- 1. An adjustable hone; comprising a spindle havingytheirlouter.faces axially aligned and tapering Iat thesame angle.tothesp indle axis and injthe` samedirection; .aplurality of longitudinally-disposed -horie holdersaround the sping `d1e embracinsthespaced enlargements. .and haw' ing correspondingly tapered inner faces seated. .upon thegcorresponding,alignedouter faces of the spaced enlargement? ysaid holders correresponding innumberrwithfthe number of faces lof an .enlargernent;y segmental/ hones-inr the re- .spectiveholders 'adaptedwhenthe holders are i 1-. contracted to`r forma cylindricalabrasive surface Varoundfthe spindle; `lextensionsat,the endsof y ,l Veach holderhaving theirouterffacesginclined toywards the `axi'sfof.4 therspindle; ya vcollar vaxially movably mounted atone en'd of said yspindle and `disposed. atp oneend .offthe holders and having a f vconical recess-receiving. .theadjacentholder ex- .ten'sions; said spindlehavingan -axialborev in its opposite'end;land.=a..second.. collar `at the yopposite end of theholdershaving 'atubular extension slidably .engaging the` bore:y and. yieldably c onnected withthe spindle'a'nd having a conical spindle I is provided with enlargements In each f, having anxannular groove Im therein in which vis confined anrendless spirally-coiled spring [pw f to position the spring Ip axially ofthespindle.A The enlargements' In are .cut away as at lq in;

springs 8g to enter between thepairs and under the coiled spring Ip. Such arrangement will per-v mit the holders 8 to expand and retract radially of spindle I, and will also permit the spindlev I to be shifted axially of the holder assembly, saidy springs 8g and Ip`yieldably urging the holders 8 inwardly towards the axis of said spindle.

As shown in Figs. 13, 14 and l5, means are provided for visuallyindicating lto 'the 'operator 1 recess .receiving the adjacent .holdergr extensions, whereby when thez'spindle moved `axially of ythe first mentioned collar the contacting 'tapered surfaces of the holders and spindle will adjust the holders'radially ofthe spindle 'whilefthe said collars will 4yieldably retainfthehoiders on the spindle..

. V2; Ina honeasv'set forthiin claimflxfrlthe side faces .offsaid holders'fandhones abutting when Vthe :holders are vfully contracted around the 'fspindlell y .l

E.v 3.,.,Ina hone as set forth infclaim 1,said hone segments having' groove sections in their outer lfacesadapted whenthe holders are fully cony tracted vto align and vform complete spiral grooves around the periphery of vthe hone.

4. In a hone as set forth in claim 1, an annular scale on the periphery of the first mentionedv collar cooperating with a pointer xedly mountthe diameter to which the hone isvadjusted'. In 1 this modification the lperiphery of` the collar"'2- adjacent the ends of hones 9 is provided witha'n annular graduated scale 2x cooperating with a pointer 9a: .extending from the adjacent-'end of one of the hones 9, said pointer 9a: overlying the surfaceofy the scale 2a: and having itsjedge or,

point disposed` opposite `the zerofy graduation f 2y of the scale when all of the holders of hones 9 are in their' fully retracted positions as indi-` ed on the end of one hone segment, whereby the diameter -to which the cone is adjusted will be visually indicated.

s. Lailaadjudanty hone, cempreising a spindle vprovided with spaced polygonal enlargement having-their outer faces tapering at the same angle n toj the spindleaxis and in the same direction,A` thel corresponding faces of the spaced enlargements being axially aligned;a plurality of longitudinally disposed hone holders around Vthe spindle having correspondingly tapered inner faces seated lupon the: corresponding aligned outer faces of the spaced enlargement; said holdof the holders and havingv a conical recess receivingythe adjacent holder extensions; said spindle having an axial bore in its opposite end;`

- "and fa second collar at the opposite end of the holdersf'having a `tubular extension slidably en- Agagiiig thebore and yieldably connected with the spindleandha'ving a conical recess receiving the adjacentA holder extensions, whereby when the v*spindle-is moved' axially of the first mentioned collai` theco'ntacting tapered surfaces of the *holders and spindle will adjust the holders radialfly' :of the spindle while the said collars will yield- 1 ably retain -theholde'rs on the spindle.

6.1In ahone as set forth in claim 5, said prevvventing means comprising guides on the tapered inner faces of the holders engaging axially disposed'longitudinal'slots in the tapered faces of 7. Ina hone as set forth in claim 5,'interenlgagin'g springs on the holders and spindle intermediate the`ends thereof for yieldingly prevent- 8.v lIn a hone asv set forth in claim 5,' the side ia'cesof said holders Iand hones abuttingwhen the holders-are fully contracted around the spindle. 9'.V In a hone as set forth in claim 5, said hone 'segments havinggroove sections in their outer f lfaces'adapted whenl the holders are fully cnff tracted to align and form complete spiral grooves "f yaround the periphery of the hone.

:10. In 'ahone as set forth in claim 5, an annun i-lar scale on the periphery of the first mentioned ollar cooperating with a pointer fixedly mount- ."'ed on the end of one hone segment, whereby the diameter' to which the hone is adjusted will be visually indicated.

1/1. An :adjustable hone, comprising a spindle "..provided withspaced polygonal enlargements having their outer faces tapering at the same angle to the spindle axis and in the same direction'. the corresponding faces of the spaced enlargements J being axially aligned; a plurality of longitudinally disposed hone holders around the spindlev `having correspondingly tapered inner faces seated upon the corresponding outer faces of the spaced enlargements; said holders Y corresponding in number with the number of faces of an enlargement; segmental hones in the respective holders adapted when the holders are contracted to form a cylindrical abrasive surface around thespindle; extensions at the ends of each holder having their outer faces inclined towards the axis of the spindle; means for yieldingly preventing bulging of the holders intermediate their ends while permitting radial adjustkment of the holders on the spindle; a collar axially movably mounted with respect to said spindle and disposed at one end of the holders and having a conical recess receiving the Aadjacent holder extensions; and a second collar at the opposite end of the lholders yieldably connected 4'-firig. bulging i of the holders while permitting radial adjustment of the holders on the spindle.`

with the spindle and having a conical recess receiving the adjacent holder extensions whereby when the spindle is moved' axially of the rst mentioned collar the contacting tapered surfaces -of the holders and spindle will adjust the holders radially of the spindle while the said collars will yieldably retain the holders on the spindle.

12. In a hone as set-forth in claim 11,` means for preventing lateral movement of the holders on the spindle.

13. In a hone as set forth in claim 11, said preventing meanscomprising interengaging flat springs on the holders and spindle intermediate the ends thereof.

14. `In a hone as set forth in claim 11, said preventing means comprising flat springs on the holders and circular springs around the spindle confined between a series of pairs of spaced members on the spindle disposed intermediate the ends thereof, the flat springs entering between the pairs and underlying the circular springs.

A15. In a hone as set forth in claimll, the side faces of said holders and hones yabutting when the holders are fully contracted around the spindle.

16. Ina hone as set forth in claim 11, said lione segments having groovesections in their outer faces adapted when the holders are fully 'contracted to align and form complete spiral grooves around the periphery of the hone.

17. In a hone as set forth in claim 11. an annular scale on the periphery of the first mentioned collar cooperating with a pointer fixedly mounted on the end of one hone segment, whereby the diameter to which the hone is adjusted will be visually indicated.

. JOI-IN J. PALOTCE. 

